Fishing knot tightener



FIG. 1 is a front perspective view of the fishing knot tightener showing my design;

FIG. 2 is a top plan view thereof;

FIG. 3 side elevational view thereof;

FIG. 4 is a front-end elevational view thereof; and,

FIG. 5 is a rear-end elevational view thereof.

The broken line showing of environment in FIG. 1 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a fishing knot tightener, as shown and described. 